Jan N. M. IJzermans integrates Internal medicine with Oncology in his research. He merges many fields, such as Surgery and Nephrectomy, in his writings. He merges many fields, such as Nephrectomy and Surgery, in his writings. His research on Transplantation frequently connects to adjacent areas such as Liver transplantation. Liver transplantation and Transplantation are commonly linked in his work. Jan N. M. IJzermans performs multidisciplinary studies into Immunology and Immune system in his work. Jan N. M. IJzermans integrates many fields in his works, including Immune system and Immunology. He merges Kidney with Kidney transplantation in his study. Jan N. M. IJzermans integrates Kidney transplantation and Kidney in his research.